... Cutter They are suitable to Herrenknecht, Mitsubishi, Wirth, Komatsu, Robbins machines. 137mm to 432mm Roller Cutter/Shield Cutter Face Single Disc ... Scrapers are suitable for Herrenknecht, Mitsubishi, Wirth,Komatsu, Robbins tunnel boring machines.We also can produce according to customers drawings or samples ...